Theoria artis muniendi modernae, das ist, kunstmässige Hand-Grieffe, und Anweisung der vierfachen Fortification, nach welcher heutiges Tages in Europa die Vestungen pflegen erbauet, und mit Aussenwercken verwahret zu werden : auss den mathematischen rechten Fundamenten in mechanische versetzet, allen, so der Fortification begierig, und etwas hierin lernen, auch Zeit und Mühe anwenden wollen, zu gut an Tag gegeben
Theoria artis muniendi modernae is a 1689 German fortification manual by Christoph Heer, published by Johann David Zunner, aimed at students of military engineering who want to learn the practical craft of building star-shaped fortresses. Its plates show each fortress as a plan view, with cross-sections and elevations of ramparts, bastions, moats and outworks drawn in fine hatched line. A designer might take from them the crisp radiating star geometry, layered polygonal outlines, and the clear diagrammatic way the pages label each stage of construction.
